[cdi-dev] [JBoss JIRA] Commented: (CDI-129) introduce @EnterpriseScoped (or similar)

Mark Struberg (JIRA) jira-events at lists.jboss.org
Tue May 17 19:04:01 EDT 2011

    [ https://issues.jboss.org/browse/CDI-129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12602718#comment-12602718 ] 

Mark Struberg commented on CDI-129:

Probably because of the heavily underspecified classloader behaviour in EE in this area?

I was really confused about this too also. Because the Servlet spec (which the EE umbrella spec references prominently) imo _exactly_ defines that WebApplications must not interfere with other WebApplications but must be isolated well from each other.

But most old EE servers (JBoss4 and 5 are perfect examples for this, as are the old WebLogics) ship with almost no isolation at all it seems! I actually never understood why they behave this way as _default_!

@Marius: A Bean can only be used in a shared library if it's type is available on the shared classpath too. E.g. in a ejb-jars lib. And even if one webapp uses an @Alternative which is only available in this very one webapp, then there is no problem. Because injecting an @ApplicationScoped bean will still give you the contextual reference (the proxy). They simply refer to different contextual instances. There is really not much difference to a @SessionScoped bean of which it's class is in a shared ejb-jars lib.

Or am I overlooking something?

> introduce @EnterpriseScoped (or similar)
> ----------------------------------------
>                 Key: CDI-129
>                 URL: https://issues.jboss.org/browse/CDI-129
>             Project: CDI Specification Issues
>          Issue Type: Feature Request
>          Components: Contexts
>    Affects Versions: 1.0
>            Reporter: Mark Struberg
>             Fix For: 1.1 (Proposed)
> Since @ApplicationScoped currently is defined in 6.5.2 as to be 'like in the Servlet specification' this means that you will get a new instance for every WebApplication (WAR file).
> There is currently no specified CDI scope for providing a single shared instance for a whole EAR.
> We could (ab-)use @Singleton for that, but this is currently not well defined at all.
> Alternatively we could introduce an own new annotation like @EnterpriseScoped or likes. 

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